
<template>
    <el-container class="home-container">
      <!--头部区域-->
      <el-header>
        <div>
          <span>电商后台管理系统</span>
        </div>
        <el-button  type="info" @click="logout">退出</el-button>
      </el-header>
      <!--页面主题区域-->
      <el-container>
        <!--侧边栏-->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse">|||
          </div>
          <!--侧边栏菜单区域-->
          <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition='false' router :default-active="activePath">
            <!--一级菜单-->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key='item.id'>
              <!--一级菜单的模板区域-->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
              </el-menu-item>
            </el-submenu>
    </el-menu>
        </el-aside>
        <!--右侧内容主题-->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-finance',
        101: 'el-icon-s-cooperation',
        102: 'el-icon-s-order',
        145: 'el-icon-s-data'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meat.msg)
      this.menulist = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style type="text/less" lang="less" scoped>
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0%;
  align-items: center;
  color: #fff;
  font-size: 25px

}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main{
  background-color: #eaedf1
}
.home-container{
  height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
